Their enemy's forte was the sky battle whereas the Valkyries although still capable of fighting in the sky using the Mana Wings, they were nowhere as fast as when on the ground.
Because of this, even if the harpies were individually lower levelled them, a group of them are still somewhat able to hold back the Valkyries.
"Master those two…"
"Yeah, I know" Simon could already see without Annette pointing it out, the two strongest subordinates of the queen of harpies were yet to join the battle. Those two were standing in the backlines and commanding the Harpies.
From their aura, it was evident that they were more powerful than the others around them. If the harpies fighting in the sky were around disaster class..ie. around level 500, those two would be calamity class. Beings that broke through level 600.
